The role of greenhouse gases in radiative equilibrium – Thermodynamic evaluation
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Helmut Ullmann
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Martin Bülow
Abstract
The significance of greenhouse gases for climate change is assessed in the case of carbon dioxide on the basis of thermodynamic data. According to the values of the molar heat capacity, no increased heat-storing property of this greenhouse gas can be determined. The absorption and desorption of infrared radiation by the greenhouse gases is seen as a reversible dynamic process, which on the one hand reduces the IR radiation from the Sun, and on the other hand, delays the re-radiation from the Earth. As converters of heat into IR photons and vice versa, the greenhouse gases play an important role in balancing the radiation. The direction of heat transport in the atmosphere is determined by the 2nd Law of Thermodynamics. The range of IR radiation is determined according to the gradation of air pressure in the atmosphere.
Zusammenfassung
Die Bedeutung von Treibhausgasen für den Klimawandel wird im Fall von Kohlendioxid anhand thermodynamischer Daten beurteilt. Anhand der Werte der molaren Wärmekapazität kann keine erhöhte Wärmespeichereigenschaft dieses Treibhausgases festgestellt werden. Die Absorption und Desorption von Infrarot-Strahlung durch die Treibhausgase wird als ein reversibler dynamischer Prozess angesehen, der einerseits die Infrarot-Strahlung der Sonne reduziert und andererseits die Rückstrahlung von der Erde verzögert. Als Wandler von Wärme in IR-Photonen und umgekehrt spielen die Treibhausgase eine wichtige Rolle beim Ausgleich der Strahlung. Die Richtung des Wärmetransports in der Atmosphäre wird durch den 2. Hauptsatz der Thermodynamik bestimmt. Die Reichweite der IR-Strahlung wird durch die Abstufung des Luftdrucks in der Atmosphäre bestimmt.
Acknowledgments
Helmut Ullmann and Martin Bülow would like to thank their wives Erika Ullmann and Heidrun M. Bülow, respectively, for their patience and constant encouragement while working on the manuscript in difficult times.
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Research ethics: Not applicable.
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Author contributions: Both authors have accepted responsibility for the entire content of this manuscript and approved its submission. Helmut Ullmann and Martin Bülow: Developing ideas, writing and interpreting data as well as reviewing the manuscript.
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Competing interests: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
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© 2024 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
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Artikel in diesem Heft
- Frontmatter
- Original Papers
- Gamma radiation-induced degradation of Acid Violet 49 in the presence of hydrogen peroxide (H2O2) in an aqueous medium
- Oxygen doped g-C3N4/LDH composite as highly efficient photocatalyst for wastewater treatment
- Facile synthesis of lanthanum carbonate octahydrate and lanthanum oxide nanoparticles by sonochemical method: systematic characterizations
- Numerical study on the temperature dependence of soot formation in acetylene pyrolysis blended with methane, formaldehyde, methanol, and dimethyl ether
- The role of greenhouse gases in radiative equilibrium – Thermodynamic evaluation
- Ab initio study of surfaces of lead and tin based metal halide perovskite structures
- Experimental study of heat pipes for battery cooling technology in EVs
- Cellulose acetate sheet supported gold nanoparticles for the catalytic reduction of toxic organic pollutants
